Eighth Wonder of the World (idea)

We'll give him more than chains. He's always been King of
his world. But we'll teach him fear! We're millionaires, boys, I'll share
it with all of you. Why, in a few months, it'll be up in lights on Broadway:
'Kong - the Eighth Wonder of the World!'

"Eighth Wonder of the World" was the working title of a screenplay started
by David O. Selznick in the early 1930s, which later developed into
the classic film King Kong.

Although a few may naively use this phrase to describe their favorite thing
in the world, most users are humbugs out to make a profit. Whenever
you hear this phrase, hold on to your wallet; if you really must go see,
bring along a block of salt large enough to sit upon, and prepare to be
disappointed. And don't bring back any Feejee Mermaids!

A quick Google search finds the following things saddled with the
unfortunate moniker of "Eighth Wonder of the World":

You get the picture; I'm not going to go through all 143,000 entries. I needn't go into peoples' descriptions of the anatomy of their significant others.

That's not to say that some of these things aren't wonderful to behold,
and worth parting with some of your hard-earned cash for. However, I do
wish their promoters had been more original and not used this tired old
phrase. It's usually hyperbolic, and always subjective, a
way of indirectly saying